Civil Team 2 - Completion

This consolidated update showcases the completion of the 5 stations from Rochor to Botanic Gardens under the Downtown Line 2's civil team 2 project, excluding Tan Kah Kee Station.

Rochor Station

Entrance B

Little India & Rochor

Architectural works have almost completed at the 2 stations. Reinstatement to the surface at Little India has completed, and the temporary road deck above the canal has been demolished. The subsequent demolishment of the old canal is expected to be handled by the NSE contractor within the next 2 years.

Reinstatement is taking place at Rochor similarly, with the intersection between Rochor Canal Road and Bencoolen St realigned. The retrieval shaft at Queen Street has also been reinstated back. Photos in this update were taken from SSangyong's facebook page prior to June.

The box tunnel for the future North South Expressway (NSE) runs above the roof of the Rochor Station 

Little India Realigns

Little India progresses onward as the next station to complete reinstatement works on the surface. The permanent realignment of the southbound Bukit Timah Road was implemented earlier this morning. The temporary road decking above the old canal will be subsequently demolished alongside the former Rochor Canal.

Realignment as of 7am (Photo Cr: Aran)

Little India Clads

Cladding works have been on-going at the Little India station for several months of which the architectural finishing to the entrances, in addition to the ceiling of the concourse and platform levels, have completed. The site has also undergone some reinstatement works, with a portion of the Land Transport Authority office carpark reinstated beside the entrance. Casting is on going to cover up the TSA shaft and we can expect backfilling works from the next quarter.

This is a joint update with the C921 Ssangyong FB.

Mar 13 - Completed entrance

Jan 27 - Cladding of ceiling completed with M&E installation

Rochor Realigns (2)

Another realignment of Rochor Canal Road took place this week. The Ophir-bound carraigeway has now been diverted over the completed cut and cover tunnels. This alignment is expected to hold until the completion of the future North-South Expressway.

The station is progressing well. In this night update we look at the cooling tower which has its front face cladded. The 2 entrances and ventilation building are still in the midst of its architectural finishing.

C921 Rochor worksite, March 13

Downtown Line 2

As the Downtown Line 2 progresses closer to its completion, the public will begin to notice considerable amount of changes to the site landscape on the surface, with the introduction of aesthetics fittings and mechanical/electrical installations to the superstructures. A short consolidated update today tracks the progress of the DTL2 over the first few weeks of 2015, prior to the next quarterly-update which me and WK hope to commence right after CNY.

January 23 - Reinstatement at Newton with the newly opened bus bay

Rochor Realigns

Many new observations have been noted at C921 throughout the past month. The most notable difference is the straightening of the northbound Rochor Canal Road. The traffic diversion was smoothly facilitated at the start of the month. Works are now underway to demolish the former road and remove its road deck. M&E works are taking place along the main entrance and cooling tower. Across the road, the 2 lifts have been installed into Entrance B and with the completion of its structure, the site has been cleared allowing for the reopening of Perak Road.

To the south, Ophir Road has also been realigned over the newly-decked Rochor Canal near Sim Lim Tower. Further south, the Queen St retrieval shaft is in the midst of backfilling. Reinstatement works for Tekka Lane at Little India have begun as well.

Rochor Canal Road Realigned

Diverted Ophir Road over the Rochor Canal deck

Backfilling of Queen St shaft with a long-arm excavator

Pre-reinstatement of Tekka Lane beside the LTA office - Credits to Tee Neung Dusanthiah

Rochor receives a roof

Since our previous update in August, work has moved swiftly that another update is warranted. Most notably is that Entrance A next to Sim Lim Square has received the roof framework and will begin installation soon after.

Entrance A with the metal roof frame.

Little India

M&E and Architectural works are in full swing within the Little India station.

Entrance E and F are new additions to the interchange under the DTL project. Also included are A&A works to Entrance A and C for the construction of lift shafts. Piling and Excavation works are currently underway respectively. Drawn by Seloloving, SkyscraperCity

Architecture works above the platform level

Entrance F and E over the new backfilled Rochor canal

Rochor

We kick start our Q3 updates for Stage 2 with Rochor. Works on the super structures have progressed throughout the past 4 months and is nearing completion. Casting and waterproofing works for the future North South Expressway tunnels are on-going. Backfilling works should commence and complete by year end. Jointly updated with C921 SSY FB.

Schematic map of Rochor station - Drawn by Seloloving, SkyscraperCity. This shows the location of the station's
entrances, which are both barrier-free accessible. Also shown is the covered walkway network which will extend 400m
from the station entrances.

Platform of Rochor Station

3 Superstructures - Entrance A&B in the background, cooling tower in the foreground

Day 13, Rochor

One of the most complex projects ever to be undertaken in Singapore, Rochor has seen repeated stages of traffic diversions throughout its construction phase due to the relocation of the Rochor Canal.

A section of the North South Expressway will be stacked on the station's roof, and its tunnel will be built together with the Downtown Line. The station will have 2 entrances. Entrance B will feature 2 elevators on the southbound (SB) side of the road. On the opposite side of the road, the ventilation tower will be situated together with the main entrance A next to Sim Lim Square. An additional structure housing cooling towers for the station will also be located on this side of the road.

Overview of station box

Station roof

Platform of Rochor station

Day 12, Little India

Little India (LTI) is one of the 4 stations that have commenced structural works at the surface. In fact, it is presently leading progress for the entire DTL2 with both entrances achieving Basic Structural Completion (BSC). Entrance 1 is located outside the Land Transport Authority (LTA) Headquarters, providing a new entry point to the station, while entrance 2 is being integrated with entrance B, providing swift access to the concourses of both the North East Line (NEL) and Downtown Line without having to detour around the paid area.

Contract 921 of the Downtown Line also involves the construction of the permanent Rochor canal and A&A works to provide barrier free access at the existing entrance A and C of the NEL. To date, the canal roof has been successfully completed while piling and excavation has begun on the lift shafts.

Concourse of LTI

Platform of LTI

Entrance 1 (Exit F)

Entrance 2 (Exit G)

February Tunnel Progress (2)

C917A

C917A
S602 has concluded soil improvement works however still stuck outside the Cascadia at over 200 rings. The soil is terribly soft and unstable in this sector hence the repetitive chemical grouting over the course of the last 2 months. Tunnelling works shall resume in about 10 days.

S603 at 687 rings (Feb 26, ~69% completed)
TBM has slowed down to around 2-3 rings a day due to granite. The granite formation shall persist for another 50m till it reaches the Bukit Timah First Diversion Canal. An April breakthrough still stands.

C918A

C918A
S604 at 629 rings (Feb 26, ~96% completed)
TBM made immense progress in the middle of March. There was a day it cast a whopping 8 rings during the day shift. Currently underpassing the existing CCL tunnels, breakthrough is scheduled within the first week of March.

S605 at 375 rings (Feb 2, ~56% completed) 
Tunnelling has slowed down in this sector as well. An April breakthrough seems likely.

C921
Photos of 608's final breakthrough at Queen St shaft. Lifting of machine to the surface is scheduled after a week.

Breakthrough of EP bound tunnel

Hoisting the receiving cradle into position

Receiving

Photo Credits - สัญญา เจ้าลืม

S608 Docks Once More

We have just received SMS that S608 has docked at the Queen St shaft after successfully completing the final Expo bound drive. This concludes about 9 months of tunnel works for C921. 4 Herrenknecht TBMs remain beneath the ground between KAP-SAV and TKK-BTN. The next breakthrough of S604 is anticipated to take place at BTN by the end of next month.

More photos to come soon.

Little India February

Little India station is one of those with the quickest pace of construction on Stage 2 along with Cashew station. The new exit near the North East Line (NEL) station is currently being integrated with the existing exit to provide a single combined entry-point for easy use by commuters. The roofs are being linked and other alterations being made so that the two entry-points will provide a one-stop solution for commuters heading to either the NEL or Downtown Line.

02 February 2014

February Tunnel Progress (1)

C917A (Yellow sector completed by Alpine)

C917A
S602 still undergoing grouting outside the Cascadia, at over 200 rings. This will certainly be the last BP bound tunnel to complete within Stage 2, with an expected breakthrough only after June.
S603 at 605 rings (Feb 5, ~61% completed) TBM is quickly inching towards SAV. Expected breakthrough April.

C918A

C918A
S604 at 501 rings (Feb 3, ~76% completed) Expected breakthrough end March
S605 at 344 rings (Feb 2, ~51% completed) Ether BTN or SAV would see the final EP bound breakthrough as both machines seem likely to complete tunelling within a similar time span with under 400 rings more to cast. Expected breakthrough April

C921
S608 is about 2 rings away from breakthrough and is scheduled to complete its Expo bound drive by this week. Detailed update to come.

C937
TBM2 is now at 295 Rings. As mentioned in the previous post, the main body of the machine is currently underpassing the CTE portal at Upp Cross St. Advancing around 3 rings each day its most likely to reach its reception at Chinatown early March.

TBM undercrossing the CTE portals

Stage 2 update January 2014

A month has passed since we entered into 2014 and this provides a good chance to look back at the progress over the stage 2 stations thus far. On the whole, the stations are progressing swiftly towards completion in 2016. It was reported in December that "Several stations have achieved basic structural completion for electrical and mechanical installation works to begin and this will be progressively achieved at all 12 stations by mid-2014". It is notable that most station structures are taking shape decently, with several showing signs of reaching the final levels where the entrances and exits pop up.

Tunnel Update

An overview of the progress of the remaining tunnels for stage 2:

C917A S603 at 530 rings (Jan 24, ~54% completed) TBM is progressing at a whopping speed of 10~12 rings each day. Tunnelling could complete within the next 2-3 months. 

603 beneath the junction of swiss club road

S602 over 200 rings. Soil improvement works are being carried out outside the Nexus.

C918A
S604 at 467 rings (Jan 21, ~71% completed) 
TBM is now under PUB's DTSS, grouting works have ceased near the slip road. Expected breakthrough early March.

S605 at 294 rings (Jan 22, ~44% completed)TBM has crossed the canal and is edging along Dunearn Underpass. Expected breakthrough mid March

S605 route

TBM churning beneath the canal

C921
S608 at 184 rings (Jan 23, ~87% completed)
28 Rings to go. Expected breakthrough after CNY.

DTL2 January Tunnelling Overview

C918A diagram (1) from TKK launch shaft

C921

An overview of the progress of the remaining 5 tunnels for stage 2:

C918A
S604 at 405 rings (~61% completed)
S605 at 209 rings (~31% completed)

C921
S608 at 105 rings (~51% completed)

C917A
2nd route of grouting on S603 has completed. 602 is now going through its first round of soil improvement works near The Cascadia POB. Right lane of the corridor road has been temporarily closed to facilitate space for the site works.

I'm expecting S608 to be our next breakthrough at Queen St next month, followed by S604 at BTN.

DTL2 December tunnel progress

December tunnel chart for DTL2

C918A

C921

An overview of the progress of the remaining 5 tunnels for stage 2:

C918A
S604 at 356 rings (~55% completed)
S605 at 73 rings (~11% completed)

C921
S608 at 41 rings (~20% completed)

Will try and get updates for the last 2 tunnels under C917A.